Spaghetti Cacio e Pepe

Pro tips

• Reserve at least 1 cup of starchy pasta water before draining—it is the foundation of the emulsion, not optional.
• Grate Pecorino Romano finely and add it off-heat or over very low heat to prevent the cheese from clumping or separating.
• Use a coarse grind of freshly ground black pepper added at the start and finish to build layered pepper flavor and texture.
• Combine hot drained pasta with the water-and-pepper base while both are warm, then fold in cheese gradually, stirring constantly until creamy.

Substitutions

• Pecorino Romano → Grana Padano (milder, less traditional but acceptable in a pinch)
• Spaghetti → Tonnarelli or Bucatini (similar thickness and texture work well)

Storage & make-ahead

Best served immediately. Refrigerate leftovers in an airtight container for up to 1 day; reheat gently on low heat with 2–3 tablespoons water to restore creaminess.

Why does my cacio e pepe sauce break or turn grainy?

The sauce breaks when the cheese curdles from high heat or too-low water content. Keep heat low, reserve starchy pasta water, and add cheese slowly while stirring constantly into the warm (not boiling) pasta water.

Can I use regular Parmesan instead of Pecorino Romano?

Not recommended. Pecorino Romano is saltier and has a sharper, more peppery flavor essential to the dish. Parmesan will produce a milder, less authentic result.

What if I don't have freshly ground black pepper?

Freshly ground pepper is critical for flavor and texture. Pre-ground loses potency quickly. Invest in a pepper mill; the coarse grind is part of the dish's identity.

How much starchy pasta water should I reserve?

Reserve about 1 cup before draining. The starch in this water is what emulsifies the cheese and pasta liquid into a creamy sauce—don't skip this step.

Can I make this ahead or store leftovers?

Cacio e pepe is best eaten immediately; the sauce sets and becomes gluey when cold. Refrigerate leftovers up to 1 day and reheat gently with a splash of water to loosen the sauce.